Improved metallic window-shutter



duivel what gaat aan.

B. A.JENKINS,OF LACROSSE,V WISCONSIN.'

Letters Patent No. 93,996, dated August 24, 1869.

To all whom itmay concern.-

Beit known that I, B. A. JENKINS, of La Grosse, inthe county of La Crosse, and State of lVisc-onsin, have invented certain new and useful Improvements in Metallic Window-Shutters and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanyingdrawings, making a part of this specification, in which- Figure l is a view of the outside of the shutter, showing the slats shut.

Figure 2 is a view of the inside of the shutter, showing the slats shut.

Figure 3 is a perspective view of one of the slats, enlarged. 5

Figure 4 is an enlarged section, taken transversely through three slats closed.

Figure 5 is a similar view of three slats open.

Figure 6 isa portion of a slat, showing the manner of forming the ears to which the slat-rod is pivoted.

Figure 7 is an enlarged horizontal section through the shutter-flame, showing the manner of constructing the vertical parts of this frame.

Similar letters ofreference indicate corresponding parts in the several gures.

This invention relates tocertain novel improvements on the metallic shutter for which Letters Patent of the United States were granted to me, on the 17th day of November, 1868.

The nature of my invention and improvement consists- First, in providing for constructing the pieces constituting the frame of a shutter of narrow metallic plates, riveted to interposed spacing and stiii`eningbars, and united. at their ends, so as to form a shutterframe having hollow walls, which can be madestronger and cheaper than metallic shutter-frames made of plates bent in the form of the letter U, as will be' hereinafter explained. v

Secondly, in a hollow metallic shutter-Slat, constructed of sheet-metal, bent so as to leave its overlapping edge of a single thickness, and so that the pivotal ears or lugs constitute a part of and are produced out of the said plate, as will be hereinafter explaiued.

To enable others skilled in the ait to understand my invention, I will describe its construction and opera tion.

In the accompanying drawings, I have represented a window-shutter having its slats pivoted to it, so that they will all vibrate about their respective pivotal connections, which are at an intermediate point between the longitudinalv edges of each slat; but in carrying out my invention, the slats may belmade stationary, or they may be connected to their frame by pivots at their corners.

The frame ofthe shutter consists of upright pieces, united at their upper ends, by riveting or otherwise,

Ato a cross-piece,.A1, and at their bottomA ends by a cross-plate, A2, as shown'in the drawings.

' Each one of the uprights of the shutter consists of two plates, A A, of suitable width and-thickness, 'secured, by means of rivets i i, to a bar, G, which is of such widthand thickness as to afford all the inflexibility required, and leave a narrowair-circulatin g space between the plates A A, as clearly shown in iig. 7

This bar G is flat on three sides, and presents a dat finished surface upon the inner edge of its upright, or that edge-which ylies nearest the ends ofthe slats B.r

The upper cross-pieceA1 may b e made as 'described for the upright pieces, viz, of two plates, riveted along their inner edges to a spacing and stiffening-bar; or, if desirable, this cross-piece may be made of a single plate, bent in the form of the letter U. In eithercase, an air-circulating space is between its front and backplates. The bottom ends of the uprights may be connected 'by rivets, or otherwise, to the ends of a single plate, A, shown lin figs. 1,-2 and 7, which need not be double.

A The frame of the shutters described in the schedule annexed to my Letters Patent above referred to, was

made of upright and horizontal pieces, each one of which consisted of a thin plate, bent so as to present, in cross-section, the form of the letter U. Shutters made in this way are very substantial, and in many other respects desirable; but owing to the necessity of bending the metal in the U-form, the very best and most expensive wrought-plate is required. To obviate this expense, I now make each one of the uprights of the shutter-frames -of two narrow plates, of an inferior quality, but, for all practical purposes, just as good a A metal, and unite these plates by riveting them to an interposed bar, as described, thus enabling me to manufacture the shutters for less cost than hitherto.

The barsG G are drilled at required points for receiving the pivot-rods b2 ofthe movable slats, if movable slats are used.

I ,construct each one of the slats B of a single plate of sheet-metal, of proper width and length, and so shape the plate, before it is bent, as to leave at the required pointsear-pieces,b1 b1, through which holes are made,

of proper size to receive the rod b2, by which the slat l is pivoted to the bars G G of plates A A. Y

I also form ears l1Y b on each side of the middle vofthe length of the slat, and at a proper distance apart, by means of a suitable cutting-tool, whichproduces these ears out of the metal composing the slat. They are then perforated and turned out, as shown in gs. 3 and 6, and serve to receive the pins or pivots g, by which the rod or wire O is pivoted to the slat, as clearly shown in iigs. 2, 4and 5.

After preparing the Slat-plate as described, it is bent,

as shown in the drawings, so as to form an air-circu-` lating space for about two-thirds of its width, and extending from one end to the other; vand that portion vprevent too great a thickness in the shutter.

Having bent the Slat-plate as described and shown, the ears b1 b1, at its ends, are bentat right angles to their plate, so as to receive through them the rod b2, by which the slat is pivoted to the bars G G of the frame.

Having arranged all the slats, thus. constructed, within their frame, they are all connected together, by'lneans of a rod, C, having eyes Ae formed on it in a suitable manner, which eyes are inserted between the ears b b of their respective slats, and connected to these ears by transverse pivots g.

By giving'` the rod G'annpward thrust, the slats will all shut, as shown in gs. 1, 2, and 4, and by moving it' downward the slats will al1 open, as shown in iig 5 do not confine my improved shutter or doorframe A to the use of movable slats, as the ends of the slats may be secured rigidly to the framc. Nor do I' con'- ne my improved slats to a metallic frame, constructed as herein described, as it is obvious that these slats are applicable tol other frames, and will possess the same capabilities and advantages wherever applied. Nor do I desire to claim broadly a metallic shutter-frame and metallic slats made hollow,-as these things have been done before my invention and improvement herein described.

"What I claim as new, and desire to secure by Letters Patent, is

l. Constructing the uprights of a hollow metallic shutter-frame of plates A A, fastened at their edges to a stiening and spacing-bar, G, substantially as and for the purposes described.

2. The construction of a of metal, bent substantially as described, and having st antially as set forth. 3. The ears ,b 11, formed on the hollow metallic Slat B, substantially as described, and for the purpose set forth.

B. A. JENKINS.

fitnessesz M. P. WING, T. B. EDWARDS.

a hollow slat, B, of a plate end-pieces b1 b, for receiving rod b2, formed on it, sub- 

